With the development of high technology, more and more new things ______ in the past years.
A. discovered B. have discovered
C. had been discovered D. have been discovered
That e-book is no larger than an ordinary book with a screen ______ you can read original book and film reviews.
A. in which B. of which C. that D. where
It was very lucky to see the "Monster of Lake Tianchi", ______ we didn't see it clearly.
A. still B. however C. now that D. though
– Where are you working now?
– In Chongqing. But I _____ in Shanghai for 5 years.
A. worked B. had worked C. have worked D. had been working
He likes helping others, ______ those who are in trouble.
A. in theory B. in particular C. in favor D. in practice
He pretended ______ the problem, but he ______.
A. to solve; lay B. to have solved; lied
C. to have solved; laid D. to solve; lied
